I very recently rebooted Opera in order to install an update. I have Opera set to automatically restore all the windows and tabs I had open during the previous session every time I reboot. Except that it didn't do that this time. One window came up entirely, but the other one didn't restore at all.

Some of the tabs on that window were added months ago, and have remained there through repeated reboots. I manually re-added as many a I could remember, but that's not all of them. I there any way to go get them back without sorting through possibly months of history of tabs and windows I've opened?